Tuyere for blast furnaces



June 12, 1928.

s. OHB A TUYERE FOR BLAST FURNACES Filed Aug. 16,

m r 0 m MWM MM j n& %M I admitted to the interior of the wall of the Patented June 12, 1928.

UNITED STATES SHINTARO OHBA, OF FUKUOKA, JAPAN.

TUYERE r03 BLAST FURNACES.

Application filed August 16, :1926, Serial No. 129,618, andin Japan February 24, 1926.

a tuyere, which comprises a front or inner end replaceable with a new one when the part has been injured by heat, and water circulating means in the wall of the part without any water-supplying pipe being attached to the interior of the tuyere.

Fig. 1 is a sectional elevation of a tuyerc according to my invention-being a section on line II in Fig. 2.

Fig. 2 is a plan of the tuyere, a part of the wall being sectioned in order to show the partitions in the hollow wall of the tuyere.

.Fig. 3 is a sectional plan view taken on the line III-III of Fig. 1

A tuyere of hollow wall construction with water circulating passage therein has been known to the public. Atuyere of this type is made as one body and a pipe is inserted in the interior of the wall so as to lead cooling water to the innermost portion of the interior, which portion is under the efiect of the highest temperature so that the inner part of the tuyere is injured quickly by heat notwithstanding the remaining partis not" so much injured. Since the pipe is quickly corrodeddue to'galvanic action, it requires frequent replacement by a new one. In this invention, the inner end part of a tuyere is made separable from the main part of the same but is firmly joined to the latter by means of bolts, and the interior of the wall is partitioned with longitudinal walls, so that the cooling water which is tuyere is directly led to the inner end part of the tuyere and after circulating in this part, the water passes out of the tuyere through the interior of the main part of the same.

In the drawing, 1 is the main part of a tuyere, to which is firmly attached the inner part 2 by means of bolts 3. The walls, 1 and 2, of the tuyere are made of a proper metal or alloy, preferably of aluminum with steel, copper or brass reinforcement 4. x V

In the interior of the hollow wall of the main part there' are provided two lon itudinal. partitions 5, 6, and a bafile 7, 1n such a manner that a narrow space is left The character-.

between the partitions 5 and 6, while the battle 7 terminates at a little distance from .the end of the interior face so that the passage between'the partition 6 and bafiie 7 communicates with the interior space of the wall at the end thereof. The narrow space.

between the partitions 5 and 6 has an entrance 8 and an exit 9, with which a hole 10 of the part 2 registers.

A longitudinal partition ll is provided in the interior of the wall of the inner portion 2, and the hole 10 is perforated in the bottom of the wall at theroot of the partition 11. Another hole 12 is perforated in the bottom of the wall at a symmetrical-position relative to the partition 11,- and this the water has circulated in the interior of the portion 1, it flows out of the tuyere through the hole 14, as shown by the arrows Fig. 1. In this manner the cooling water first circulates in the interior of the portion 2, and thereafter circulates in the interior of the portion 1.

According to my invention, the inner-end part of a tuyere is made se arate from-the main part of the same and 1s cooled by the cooling water in order to prevent overheating of this portion of the tuyere. It requires no pipe 1n the interior of the wall, and the inner end part only need be replaced with new one when the same is injured, so that the construction is very economical.

What I claim is:

A tuyere for. blast furnaces comprising twoparts, an inner end part and a main part, said-parts being joined together, the interior of the main part having two longitudinal partitions forming a passage therebetween and having a hole at each end in communication with the passage, 2. baflie extending from the outermost wall of the main part in the interior thereof and terminating at a short distance from the inner end wall, the outer end wall of the main part having a hole located at a point between the bafile and the adjacent partition, the interior of admitted to the first said passage in the main the inner end part being provided With a part flows directly to the inner end part and 10 longitudinal artition, there being a hole then flows out therefrom and circulates in provided in t e outermost wall of the inner the interior of the main part. i

I part at each side' of the partition in said In testimony whereof I hereunto affix my part, and these holes registering with holes signature. formed in the innermost wall of the main part in such a manner that cooling water 7 SHINTAROOHBA. 

